backup
🇺🇸
/ˈbækʌp/
🇬🇧
/ˈbækʌp/
noun
C1
extra help or support that is ready if needed
The police called for backup when the situation became dangerous.
当情况变得危险时，警察请求了支援。
C1
a copy of important data that can be used if the original is lost
Make sure you have a backup of your files in case your computer fails.
确保你有文件的备份，以防电脑出现故障。
translation
后备支持, 数据备份
词形变化
Plural
backups